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arXiv · 2207.02080

Adiabatic Quantum Zeno Dynamics of Bosonic Atom Pairs with Large Inelastic Losses

Manel Bosch Aguilera·Alexis Ghermaoui·Rémy Vatré·Raphaël Bouganne·Jérôme Beugnon·Fabrice Gerbier
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Abstract

We report on experiments exploring the non-Hermitian dynamics of pairs of two-level atoms tightly confined in an optical lattice and driven by a near-resonant laser. Although spontaneous emission is negligible for the long-lived excited state, two-body dissipation arises from strong inelastic collisions between two atoms in the excited state. We demonstrate quasi-adiabatic control of the internal state of the pairs in the quantum Zeno regime where inelastic losses dominate. Preparing each atom pair in the longest-lived eigenstate of the non-Hermitian Hamiltonian describing the dissipative dynamics, we measure a lifetime enhanced by more than two orders of magnitude in comparison to the bare two-body lifetime. The measured enhancement factor is in quantitative agreement with the expected lifetime of the prepared ``non-Hermitian dressed state''.

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Manel Bosch Aguilera, Alexis Ghermaoui, Rémy Vatré, Raphaël Bouganne, Jérôme Beugnon, Fabrice Gerbier. 2022-07-05. Adiabatic Quantum Zeno Dynamics of Bosonic Atom Pairs with Large Inelastic Losses. https://doi.org/10.1103/physreva.106.053304

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